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101.

Respiration in reptiles occurs through :A. gillsB. moist skinC. lungsD. fins

Answer» Correct Answer - C
102.

The most outstanding feature of arthropods is :A. bilaterally symmetrical bodyB. closed circulatory systemC. jointed legsD. spiny-skinned body

Answer» Correct Answer - C
103.

Respiration in arthropods occurs throughA. gillsB. booklungsC. tracheaD. all of the above

Answer» Correct Answer - D
104.

Which of the following produces seeds without fruit ? A. CycasB. riceC. fernD. grapes

Answer» Correct Answer - A
105.

In Pinus the seed is :A. enclosed within fruitB. nakedC. both (a) and (b)D. none of the above

Answer» Correct Answer - B
106.

The pinus is characterised by :A. short tree with heavy branchesB. two types of shoots and two types of conesC. large scented flowersD. large fruits bearing seeds

Answer» Correct Answer - B
107.

Arthropods are characterised byA. jointed legsB. jointed appendagesC. chitinous exoskeletonD. all the above

Answer» Correct Answer - D
108.

Crudaria is characterised byA. NematoblastsB. CoelenteronC. Tissue level of organisationD. all the above

Answer» Correct Answer - D
109.

Which of the following has three chambered heart ?A. toadB. catlaC. rohuD. ostrich

Answer» Correct Answer - A
110.

In lung fishes, the heart isA. single chamberedB. two chamberedC. three chamberedD. four chambered

Answer» Correct Answer - B
111.

Two chambered heart occurs inA. crocodilesB. fishC. amphibiansD. aves

Answer» Correct Answer - B
112.

An angiosperms plant is characterised by :A. presence of flowerB. seeds enclosed in fruitC. fibrous/tap root systemD. all of the above

Answer» Correct Answer - D
113.

Ravi has observed rhizome and circinate leaves in the given specimen. Which specimen he has observed ? A. fernB. FunariaC. SpirogyraD. Mushroom

Answer» Correct Answer - A
114.

Sachin identified the specimen displayed as a saprophyte called mushroom. What made him conclude so ?A. they have an umbrella shaped capB. they are heterotrophsC. they derive food from dead and decaying organic matterD. they derive food from the soil

Answer» Correct Answer - C
115.

Which of the following has two chambered heart ?A. rohuB. lizardC. toadD. ostrich

Answer» Correct Answer - A
116.

In which plant gills are present ?A. SpirogyraB. AgaricusC. mossD. fern

Answer» Correct Answer - B
117.

A specimen of a fish was given to identify the extrenally visible chrodate feature in it. The student would look for :A. operculumB. notochordC. dorsal tubular nerve chordD. post anal tail

Answer» Correct Answer - A
118.

Dorsal, pelvic, pectoral and tail fins are for locomotion inA. earthwormB. cockroachC. fishesD. birds

Answer» Correct Answer - C
119.

The gills in which one of the following are convered with operculum ?A. starfishB. bony fishC. cartilaginous fishD. none of these

Answer» Correct Answer - B
120.

Which of the following statements is incorrect ? A cockroach hasA. a pair of antennaeB. three pairs of legsC. body covered by exoskeletonD. body divided into 100-120 segments

Answer» Correct Answer - D
121.

Spirogyra is slimy in touch because :A. cell wall is made up of celluloseB. It is found in dirty pond waterC. pectin layer of the cell wall dissolves in water to give a slimy touchD. none of thse

Answer» Correct Answer - C
122.

The starch strong bodies present in the chloroplast of spirogyra are known asA. zygosporesB. pyrenoidsC. zoosporesD. peroxisomes

Answer» Correct Answer - B
123.

Non-flowering plants belongs to :A. cryptogamB. phanerogamsC. dicotsD. monocots

Answer» Correct Answer - A
124.

These structures in spirogyra help to suspend nucleus in the cells :A. chloroplastB. cell wallC. vacuoleD. cytoplasm

Answer» Correct Answer - D
125.

The important features that can help a student to identify spirogyra under the microspe are :A. filamentous structureB. green - coloured cylindrical cellsC. Spirally - coiled chloroplasts and filament like structureD. thick cell wall and large cell vacuole

Answer» Correct Answer - C
126.

What is the shape of chloroplast in Spirogyra ?A. cup shapeB. girdle shapeC. spiral shapeD. ring shape

Answer» Correct Answer - C
127.

What is the shape of chloroplast in Spirogyra.A. multicellular, autotrophic, root-like rhizoidsB. cytoplasmic strands, autotrophic, presence of rhizomeC. presence of male cones, nonvascular, filamentsD. filamentous, presence of cytoplasmic strands, presence of pyrenoids.

Answer» Correct Answer - D
128.

A student observed the permanent slide of spirogyra and labelled the following : cell organelles :A. nucleus, cell wall, plastid and Golgi bodiesB. nucleus, ribon shaped chloroplast, cell wall and pyrenoidsC. vacuole, cell wall, nucleus and chloroplastD. cell wall, vacuoles, cell membrane and plastid

Answer» Correct Answer - B
129.

The following diagram illustrates a filament of spirogyra as seen under the microscope. Its parts have been labelled as A,B,C,D. Functions of these parts are stated below randomly : (1) performs photosynthesis (2) controls activities of cell (3) makes the algae slippery to touch (4) stores starch and protein The correct matching of the parts and their functions are A. A-1 , B-2 , C-3 , D-4B. A-2 , B-3 , C-4 , D-1C. A-3 , B-4 , C-1 , D-2D. A-4 , B-1 , C-2 , D-3

Answer» Correct Answer - C
130.

Genetic material of prokaryotes is calledA. nucleoidB. nucleolusC. plasmidD. mesosome

Answer» Correct Answer - A
131.

A group of related genera, with still less number of similarities as compared to the genus and species consititutesA. orderB. classC. familyD. division

Answer» Correct Answer - C
132.

The locomotory organs of Echinodermata areA. parapodiaB. tube feetC. muscular feetD. jointed leg

Answer» Correct Answer - B
133.

Which organisms are called primitive and how are they different from the so-called advanced organisms?

Answer» A primitive organism is the one which has a simple body structure and ancient body design or features that have not changed much over a period of time. As per the body design, the primitve organisms which hav simple structures are different from those so-called advanced organisms which have complex body structure and organization.
134.

Will advanced organisms be the same as complex organisms? Why?

Answer» Yes, The complex organisms are comaratively more advanced as compound to simple organisms. It is because the complexity of organisms has increased over evolutionary time.
135.

What is the primary characteristic on which the broad division of organisms is made?

Answer» The primary characteristic on which the first divison of organisms is made is the nature of the cell - prokaryotic or eukaryotic cell.
136.

How would you choose between two characteristics to be used for developing a hierarchy in classification ?

Answer» We choose that characteristics which depends on the first characteristics and determines the rest variety.
137.

Which division among plants has the simplest organisms?

Answer» Division Thallophyta
138.

Which do you think is a more basic characteristic for classifying organisms? (a) the place where they live. ltBRgt (b) the kind of cells they are made of. Why?

Answer» The more basic characteristic for classying organism is -(b) the kind of cells they are made of.
If the misleading to classify organisms on the basic of the place where they live because many different kinds of organism may live in the same habitat but they do not belong to the group. For example, corals, whales, octopuses, starfish, etc live in hte sea but sea but they differ with each other.
139.

List out some common features in cat, rat and bat.

Answer» Cat, Bat and Rat belong to galss Mammalia. They have following common fetures :
(i) Thees have notochord in their embryonic life.
(ii) These are warm blooded.
(iii) These have-chambered heart.
(iv) Theses have skin covered with haris and with sweat and oil glands.
140.

Why do we keep both snake and turtle in the same class ?

Answer» (b) have scales (c) breathe through lungs (d) have-chambered heary (e) are oviparous, i.e., they lays eggs with tough shells.
141.

The phylum of sedentary animals isA. MolluscaB. EchinodermataC. PoriferaD. both (a) and (b)

Answer» Correct Answer - C
142.

Phylum mollusca can be distinguished from other inverterates by the presence ofA. bilateral symmetry and exoskeletonB. a mantle and gillsC. shell and non-segmented bodyD. a mantle and a non-segmented body

Answer» Correct Answer - D
143.

Balanoglossus belons to Hemichordata which forms a connecting link betweenA. unrochodates and cephalochordatesB. urochortes and vertebratesC. cephalochordates and vertebratesD. nonchordates and chorates

Answer» Correct Answer - D
144.

Give three examples of the range of variations that you see in life- forms around you.

Answer» Examples of range of variations observed in daily life are :
`to` Organisms vary greatly in size-from microscopic bacteria to elephants, whales and large trees.
`to` The colour of various animals is quite different. Some worms are even colourless or transparent. Various types of pigments are found in plants.
`to` The life span of different organisms is also quite varied. For example, a crow lives for only 15 years, whereas a parrot lives for about 140 years.
145.

Observe the pictures of cockroach and housefly. The common features that assign tham the same phylum A. three pairs of legsB. antennaeC. wingsD. jointed legs

Answer» Correct Answer - D
146.

The number of teeth in the beak of birds are :A. 8B. 16C. 32D. none

Answer» Correct Answer - D
147.

Amphibians do not have the followingA. three chambered heartB. gills or lungsC. scalesD. muscus glands

Answer» Correct Answer - C
148.

Which among the following have scales? (i) Amphibians (ii) Pisces (iii) Reptiles (iv) MammalsA. (i) and (ii)B. (iii) and (iv)C. (ii) and (iii)D. (i) and (ii)

Answer» Correct Answer - C
149.

Marchantia is aA. ThallophytaB. PteridophytaC. GymnospermsD. Bryophyta

Answer» Correct Answer - D
150.

Which of the following plant groups is known as amphibians of the plant body ?A. AlgaeB. fungiC. GymnospermsD. Bryophyta

Answer» Correct Answer - D